PRODUCTION OF RUBBER 



1907 

 1908 

 1909 

 1910 

 1911 

 1912 



World's total 

 supply. * 



Tons. 



. 69,000 



. 70,000 



. 75,000 



. 80,000 



. 85,000 



. 96,000 



Plantation rubber 



from Ceylon and 



Jlalaya. 



Tons. 



1,130 



2,040 



4,000 



8,100 

 14,310 

 25,650 



Previous to the large increase m the production oi 

 plantation rubber which has occurred during the last 

 few years, more than half of the world's supply of rubber 

 was obtamed from Mild Para trees in the Amazon valley, 

 and the amount fiu:nislied by Central and South America 

 was more than tliree-fifths of the total. Africa con- 

 tributed about one-third and Asia about one-fifteenth 

 of the supply. Latterly, however, the Asiatic production 

 has been very considerably increased by the rubber 

 from the plantations, which amounted in 1910 to about 

 8,000 tons or one-tenth of the world's supply, in 1911 

 to about 14,000 tons or one-sixth of the world's supply, 

 and in 1912 to about 25,600 tons or more than one-fourth 

 of the world's supply. 



The production of plantation rubber will show a very 

 rapid increase diu-ing the next few years as the estates 

 already established reach the tapping stage, and there 

 is little doubt that the rubber from cultivated trees will 

 soon form a very large part of the total supply. 



Rubber Production in America. — The total exports of 

 rubber of all kuids from Brazil since 1903 are shown in 

 the following tabic : 



The quantities of the different kinds of rubber 

 ♦ Mesars. Lowia & Peat's ostiumtes. 



